baber/WOPTO huggingface dataset:
Patent GB-148362-A (GB)
Title: Improvements in cow milking machines
IPC: A01J5/04
Filed: 1920-07-09
Abstract: 148,362. Bower, S. M. Jan. 28, 1919. [Convention date]. Cow-milkers.-In pneumatic milking-machines of the type having double-chambered teat-cups, a pulsator valve 15 working over three ports is employed, the central port 18 communicating with a vacuum pump, the port 42 with the pulsasation pipe line 26, and the port 21 with one of the connexions 40 of a double milk releaser, the similar connexion 40 from the other releaser chamber 37 being connected to the pulsator pipe line. The valve 15 is of such a size that the ports 24, 42 are simultaneously connected to vacuum for a short period at the centre of the stroke, the ports being alternately uncovered for the admission of air at the end of the stroke. The milk pipe 27 leads to a fork 29, each branch of which communicates through a non-return valve 30 with one of the chambers 37 of the milk releaser, an outlet valve 38 being arranged at the bottom of each chamber. When vacuum is connected to one chamber 37, the milk enters and the milk pipe-line is exhausted. When air is admitted the valve 30 closes and the valve 38 can open to allow the milk to escape. Between the pulsation pipe line 26 and the pulsator a moisture trap is located, comprising a vessel 20 having a curtain diaphragm 21 therein and a counterbalanced valve 22 at the bottom to discharge the contents when atmospheric pressure is established in the vessel.
Patent GB-571192-A (GB)
Title: Improved means for bending tubes
IPC: B21D9/16
Filed: 1943-12-07
Abstract: 571,192. Bending tubes. DRAPER, F. C. Dec. 7, 1943, No. 20420. [Class 83 (iv)] In a machine for bending tubes of the kind having a shaped bending block over which the tube is bent by a member shaped to conform to a development of the half circumference of the finished work on the outside of the bend and mounted tangentially to the block. and adapted to roll thereover and provided with gear teeth meshing with gear teeth on the bending block, the pitch circle of the gear teeth is substantially coincident with the inner circumference of the bend. The tubes may be previously corrugated as described in Specification 571,191, or the internal surface may be subjected during bending to high fluid pressure from a reservoir as described in Specification 567,753. The tube may be secured by a clamp 3 to a former 1 with a semicircular groove round which it is bent by a semicircularly grooved member 4 which is rolled round the former by rollers 9 on a carriage 12 radially adjustable on a lever 8 which is detachably hooked to a pivot 11 at the centre of curvature of the former. The member 4 is provided with cheeks 6 which overlap the sides 7 of the former, so that at the point of bend the work is completely embraced by the member and former. The cheeks 6 are formed with gear teeth 16 co-operating with gear teeth 17 on quadrants fixed to the former, the pitch circle of which is coincident with the inner circumference of the bend so that as the member 4 rolls round the former it has a sliding movement relatively to the work in the direction of progress of the bend so as to smooth the outer surface of the tube. With tubes corrugated as described in Specification. 571,191, in which the neutral' axis is substantially coincident with the inner circumference of the bend, the sliding movement of the member is effective to iron out the corrugations on the outer side of the bend. A tubular handle 14 may be applied to the spigot 15 on the lever 8.
Patent GB-1030711-A (GB)
Title: Process for the manufacture of salts of trichloracetic acid
IPC: C07C51/41
Filed: 1963-05-22
Abstract: Substantially anhydrous alkali metal, alkaline earth metal, magnesium and ammonium salts of trichloracetic acid are prepared by gradually adding to an alkali metal, alkaline earth metal, magnesium or ammonium carbonate or an alkaline earth metal or magnesium oxide or hydroxide or a mixture thereof, molten trichloracetic acid containing a maximum of 6% by weight of water at a temperature of 35 DEG  to 100 DEG  C. so that the water content in the entire reaction mixture does not exceed 3% by weight at any stage of the reaction while effecting mechanical mixing and drying the reaction product after the conversion is terminated in the reaction zone at approximately the same temperature as that applied during the reaction.  In a modification, anhydrous acid is employed and the water added separately during the course of the reaction or is present in the metal or ammonium compound reactant.  The process of the invention may be performed batchwise or continuously.
Patent GB-1176183-A (GB)
Title: Duplicating Apparatus
IPC: B41L45/00
Filed: 1967-05-03
Abstract: 1,176,183. Printing-apparatus; addressing machines. SCRIPTOMATIC S.A. 3 May, 1967 [4 May, 1966], No. 20536/67. Headings B6C. and B6D. [Also in Division B8] Ina hectographic addressing machine, a workpiece W, Fig. 4, such as an envelope, passes over a button 130 which actuates a first one-revolution clutch 84, Fig. 12a, which in turn actuates a second one-revolution clutch 83 after an adjustable time delay, the second clutch actuating a master card feed plate 123, Fig. 4, and solvent applying means S. Cylinder tripping.-The first clutch 84 comprises a solenoid 132 energized by depression of the button 130 to retract a core 133 and release the free end 84a of a coil spring in the first clutch 84, thus drivingly connecting a gear (91), Fig. 1 (not shown), driven by the drive train of the machine, to a coaxial notched wheel (135), Fig. 8, (not shown). A latch 136, Fig. 12a, adjustably mounted on the wheel (135), is thereby rotated and caused to engage a trigger arm 137 which releases the end 83a of a coil spring in the second clutch 83 and drivingly connects a gear (79, Fig. 1) to a shaft 80, Fig. 4. A :pin 106, mounted on the shaft 80, and which normally supports a solvent applying roller 105, is thus rotated, allowing the roller 105 to apply solvent to the workpiece W. After one revolution, the second clutch 83 disconnects the shaft 80 from its driving gear (79) and the pin holds the solvent applying roller 105 in non-operative position. Addressing &c. machines.-Rollers 76, 116 apply pressure to the assembly of a master card and moistened workpiece to print on the workpiece, the position of the printed image on the workpiece being governed by the time delay set by the position of the latch 136. The master card is carried by spaced arcuate strips 126 to a collecting tray 31 and the workpiece passes beneath the strips 126, abuts against part of the tray 31 and falls into a collecting tray 32. A master card may be passed through the machine without printing by manual actuation of the solenoid 132 by a button (140, Fig. 1). The master cards may bear a colour code on their printing surfaces, which can be viewed by means of a mirror (143), Fig. 4a (not shown), placed beneath the master card carrier 30. Copying documents.-Solvent is supplied to the solvent-applying roller 105 from a container (111), Fig. 9 (not shown), having a ball valve, by means of a wick (108) leading from a tube (109) which extends from a well (110) beneath the container (111). The workpiece feed tray 29 and collecting tray 32 fold over to form the cover-plate (29a, 32a), Fig. 7 (not shown), for the machine.
Patent GB-1426725-A (GB)
Title: Electrical circuits
IPC: G01P3/48
Filed: 1972-05-03
Abstract: 1426725 Frequency discriminators CAV Ltd 27 April 1973 [3 May 1972] 20678/72 Heading H3A  A frequency/voltage converter comprises a transformer T1 supplied with an input of constant width pulses, and a capacitor C5 charged from the transformer at a constant current. The constant current arrangement comprises transistor TR8 and Zener diode D21 and the constant width pulses are produced by a monostable TR3, TR4 which is triggered by an input pulse train whose frequency is to be detected. The frequency of this pulse train is derived from the speed of an engine by a transducer arrangement 12, 13.
Patent GB-284152-A (GB)
Title: Improvements relating to insulators for high tension cables
IPC: B60M1/20
Filed: 1927-08-06
Abstract: 284,152. Berg, F. Aug. 6, 1927. Guards and perches for birds.-The insulators of an overhead high tension cable, when used in a horizontal position, are fitted with guards to prevent birds from perching on them and short-circuiting the metal end caps. A guard may consist of a ring a, Fig. 1, clipped on the insulator A and provided with projecting spikes a'. In another form, the ring a may carry a circular wire with radial supports similar to a spoked wheel. In a further construction, the guard consists of a circular plate. The guard may surround the insulator or it may extend above the upper part only, as shown in Fig. 5.
Patent GB-1479857-A (GB)
Title: Containers
IPC: B65D6/24
Filed: 1975-05-16
Abstract: 1479857 Boxes SOC ITALIANA RESINE SIR SpA 16 May 1975 [30 May 1974] 20866/75 Heading B8P A plastics container comprises a base (Fig. 1) formed with feet 1a-1i of truncated pyramid form and having reinforcing ridges 2a-2d, and four side wall (Figs. 3 (not shown) and 5) having reinforcing ridges (10), (12), (13), 30, 33, 34, 35, 36, tabs for location in apertures 3 of the base; and tabs (11) 31 for interengagement with tabs (11), 31 on the adjacent side wall panels, a cover panel, Fig. 6 (not shown), also being provided with reinforcing ridges (20) and apertures (21) for engagement with tabs on the side walls. The plastics material is preferably a heat-cured urea or phenolic resin reinforced with wood chips, container capacity may range from ¢-3 m.<SP>3</SP>, and the panels may be apertured to save weight and material. Fork lift means may be inserted between the feet 1a-1i below the container.
Patent GB-400374-A (GB)
Title: Improved means for tapping, spiling and releasing or admitting air or gas from or to casks or other containers
IPC: B67D1/08
Filed: 1932-07-25
Abstract: 400,374. Pin wrenches. BARNES, F. J. T., 184, Breakfast Creek Road, Newstead, Brisbane, Australia. July 25, 1932, No. 20971. [Class 61 (iii).] A tool for inserting a plug into a bushing A for a cask comprises a key J with projections J<1> which engage in notches J<2> in a ring E screwed on,the outside of the plug B. A packing ring C is placed between the plug B and the bushing. In the case where the ring E is internally and externally threaded to engage threads on the outside of the plug B and the inside of the bushing A, the plug B is secured against rotation by engaging it with a screw K operated by a handle K<1>, and the ring E is then secured in position by the key J.
Patent GB-1291440-A (GB)
Title: Windscreen wiper assemblies
Inventor: MELLOR WALTER
IPC: B60S1/34
Filed: 1969-04-24
Abstract: 1291440 Windscreen wipers JOSEPH LUCAS (INDUSTRIES) Ltd 26 March 1970 [24 April 1969] 21014/69 Heading A4F A vehicle windscreen wiper spindle 13, movable angularly by a crank 14, is journalled in a sleeve 11 secured to the vehicle body and has engaged therewith a part 16, e.g. a torsion spring, which is arrested by a stop 19 or 21 during angular movement of the spindle in either direction from a position in which a wiper blade carried thereby is at the middle of its stroke so that during the completion of the stroke friction between the part 16 and the spindle 13 minimizes the possibility of over-travel of the wiper blade on a wet screen.
Patent GB-217467-A (GB)
Title: Improvements in the manufacture and production of formic acid
IPC: C07C51/06
Filed: 1923-08-20
Abstract: Formic acid is produced by decomposing a mixture of ammonium formate and formamide with a mineral acid in the presence of at least one molecular proportion of water to each molecular proportion of formamide.  The mixture of ammonium formate and formamide is made by mixing the two compounds together, or by heating ammonium formate, or by the interaction of carbon monoxide and ammonia under pressure in the presence of water. Examples are given of the decomposition of the mixture with sulphuric acid in the presence of water.
Patent GB-931833-A (GB)
Title: A machine for securing lids in preserve cans
IPC: B21D51/32
Filed: 1960-06-15
Abstract: 931,833. Applying closures. USINE DU FREYDON S.A. June 15, 1960 [June 15, 1959(3)], No. 21080/60. Class 125(2). Can lids are secured by means of rollers 31 radially displaceable on bars 29 carried by a rotating plate 27 driven through a sleeve 25 from an electric motor 26. A can, with its lid in position, is raised on a base 15 until it is enclosed in a sealing chamber formed between a cup 32 and a cylinder 13. A suction device 42 on a spindle 91 is raised through a hydraulic cylinder 45, carrying with it the can lid. A vacuum pump (not shown) withdraws air from the can through a pipe 63, Fig. 5, and gas may be supplied to the chamber from a cylinder 65. The base 15 is then raised further to engage the can with the lid which is secured as follows: the slides 30 are attached to members 41 which have slots 40 engaged by rollers on fingers 39. These rollers are reciprocated vertically so causing the rollers 31 to move radially inwards and outwards alternatively to secure the lid. The rollers 31 are adjustable in relation to one another. The fingers 39 are held at the lower end of a cage 38 which is fitted on the inner ring of a ball race 37 mounted on the sleeve 25. The outer ring of the ball race 37 is connected to a lever 33 pivoted at 34 and operated hydraulically from a cylinder 35. Control mechanism. The hydraulic cylinders 35, 45 and a cylinder 22 for moving the base 15 are controlled by electrical circuits, Fig. 5a (not shown), actuated by micro-switches 47 in response to the movement of cams 48 carried on a bridge 49. The working cycle is started by push switches, Fig. 1 (not shown). The cams 48 are adjustable to vary the programme. Modifications. The movement of the base 15 and cylinder 13 may be effected by separate hydraulic cylinders, Fig. 6 (not shown). The radial movement of the rollers 31 may be effected hydraulically. Several machines may be set up together, corresponding levers having common spindles.
Patent GB-635251-A (GB)
Title: Improvements in and relating to crystal contact rectifiers
IPC: H01L23/16
Filed: 1947-08-01
Abstract: 635,251. Detectors. SYLVANIA ELECTRIC PRODUCTS, Inc. Aug. 1, 1947, No. 21087. Convention date, June 23, 1943. [Class 40 (v)] A crystal detector comprises a pair of conductors 3, 4 separated by an insulating sleeve 1 to form an enclosure for a crystal 8 with flat etched surface, a resilient contact member 7 and shock-cushioning material 10. The point contact is produced by true right circular formation of the point of member 7 and the member 7 has equal and opposite spring loops substantially in a common plane. The crystal is mounted on a gold-plated support 9, force fitted in a bore through the conductor 4 and adjusted by a screw head 11, by solder applied between a rear face of the crystal and a slotted face of the support, the crystal face first being coated with a silver oxide and oil paste, baked to remove the oil and copper plated. The supporting end of the tungsten spring member 7 is first copper or nickel plated and fired to partially alloy the plating and tungsten before soldering in a recess in the conductor 3, solder having affinity for both the gold-plated support 3 and plating, but not tungsten. The ceramic sleeve 1 is cemented to the conductors 3, 4 and has an opening 22 for a pre-adjusting tool. The detector is first tapped to stabilise the contact point, adjusted, and the point overloaded with current for short intervals to increase the burn-out resistance. The cushioning material 10 may be powder known under the Registered Trade Mark " Alundum " and the opening 22 sealed with Alundum cement, a rubber cement finally being applied over the opening 22 and screw head of the support 9. The crystal may be of silicon with a trace, e.g. 1/3 per cent, of aluminium prepared in a vacuum furnace, after cooling the melt being cut into strips and then rectangles. In Fig. 6 (not shown), the support 9 is secured to the screw head 25 by a thread of pitch differing from and opposite to that of the head to form a vernier adjustment and the support 9 keyed against rotation.
Patent GB-1218833-A (GB)
Title: Slurry concentrating apparatus
IPC: B04B11/04
Filed: 1968-05-03
Abstract: 1,218,833. Centrifugal separators. BAKER PERKINS Inc. 3 May, 1968 [5 May, 1967], No. 21119/68. Heading B2P. A slurry concentrator comprises an axially compressible helical spring 37 to the interior of which the slurry is fed at one end through a pipe D and from the interior of which separated liquid is discharged at the other end through an outlet 36, 35, 34, 34a, means being provided for compressing the spring 37 so as to close the passages 50 between the spring convolutions for a given period of time during which separation of the liquid and solid components of the slurry take place under the action of centrifugal force and for allowing the spring to expand after the given period of time so as to open the passages 50 and allow the concentrated slurry to discharge therethrough under the action of centrifugal force. The spring 37 is mounted within a housing 20, rotatable by a belt 39. One end of the spring is rigidly secured to the feed end of the housing and the other end fits around a reciprocable end member 30 against which a fluidpressure operated actuator 47 bears to effect compression and allow expansion of the spring so as to open and close the passages 50. Instead of an actuator 47 cam means may be used. The slurry fed through the pipe D is directed by a distributor 38 against a flaring inlet surface 20a in the casing 20 and enters the interior of the spring 37. The concentrated slurry discharged through the passages 50 passes through openings 42 in the casing 20 into a stationary collector 43 and thence to a chute 46. The spring 37 has a round crosssection and between its convolutions may be interposed convolutions of a flat spring 40 which provide an effective seal between the convolutions of the spring 37 when the latter is compressed. The convolutions of the spring 40 may have a progressively decreasing diameter from then inlet to the outlet end to provide weir-like baffles 41 over and around which the slurry flows whereby separation is enhanced. Alternatively, the inner diameter of the convolutions may be uniform or may increase from the inlet to the outlet. The springs may be made of metal or plastics, e.g. spring 37 of steel and spring 40 of plastics. The spring 40 may be dispensed with and seal members) may be provided between the spring convolutions of the single spring. The cycle of operations may be manually controlled or automatically controlled.
Patent GB-499803-A (GB)
Title: Improvements in or relating to the method of forming vehicle wheel rims
IPC: B21D53/30
Filed: 1937-07-30
Abstract: 499,803. Making hoops ; tube-expanders. JACKSON, L. MELLERSH-. (Kelsey- Hayes Wheel Co.) July 30, 1937, No. 21194. [Classes 83 (ii) and 83 (iv)] A vehicle wheel rim of the drop centre type is made from a hoop whose diameter corresponds to the base of the well of the finished rim by flaring the opposite end portions under axial. pressure to form in cross-section substantially straight outwardly inclined end portions connected to the centre portion by arcuate portions and to reduce the thickness progressively towards the edges, and then re-fashioning the end portions to form the sides of the well, the bead seats and the tyre-retaining flanges. A strip of metal is bent to circular form, and its ends are welded together to form a hoop A, which is shaped to truly circular form by expanding dies B. The outer portions of the hoop are then expanded by dies C which produce portions F of straight line section progressively decreasing in thickness outwardly and joined to the central portion C by parts H of arcuate section. The central portion G is then held against inward movement by a member J while the flaring portions F are reshaped by dies I. The blank is further shaped by rolls L, M, and is brought to final form by rolls P, P<1>, Q. Specifications 489,276 and 491,955 are referred to.
Patent GB-1122303-A (GB)
Title: Hydrostatic power transmission
Inventor: FORSTER DAVID JOHN BARDEN
IPC: F16H39/00
Filed: 1965-05-20
Abstract: 1,122,303. Hydrostatic transmissions; valves. DOWTY HYDRAULIC UNITS Ltd. 28 July, 1966 [20 May, 1965], No. 21423/65. Headings F2C and F2V. [Also in Division F1] In a hydrostatic transmission comprising a variable positive displacement pump 1 and a positive displacement motor 2, a by-pass passage between the transmission lines contains a flow responsive valve 9 which closes the bypass when the flow therethrough reaches a predetermined value. Thus, the by-pass is open when the pump displacement is zero or very small, and closes as the pump displacement is increased. The valves 5 and 7 are operative to connect the passage 8 to the pump outlet and passage 6 to the inlet. The ball 13 engages the seat 12 when the flow through the cylinder 11 is sufficient to move it on to the seat against the bias of the spring 14. The flow responsive valve may be a slide valve (16), Fig. 2 (not shown), movable against spring bias to close ports (19) in the valve cylinder (15). The by-pass, Fig. 3 (not shown), may connect the pump inlet and outlet (3, 4) directly, a ball valve (27) seating on a seat (25 or 26) at one of the opposite ends of a cylinder (24) in the by-pass.
Patent GB-423156-A (GB)
Title: Improvements in anastigmatic objectives for photography and projection
IPC: G02B13/04
Filed: 1934-07-23
Abstract: 423,156. Lenses. ZEISS, C., [Firm of], Carl-Zeiss-Strasse, Jena, Germany. July 23, 1934, No. 21442. Convention date, July 26, 1933. [Class 97 (i)] In an anastigmatic objective having a pair of meniscus members bounded by air on each side of the diaphragm, the concave surfaces of these members being turned towards the diaphragm and the radii of the surfaces of each pair which face the other pair being unequal, the distance apart of the two concave surfaces next to the diaphragm is made greater than four-fifths of the arithmetical mean of the radii of these surfaces. The system shown comprises one convergent and one divergent lens on each side of the diaphragm, the divergent lenses being next the diaphragm. The refractive indices of the divergent lenses are greater than 1À65 and their central thicknesses are less than 0À02 times the focal length of the system. The system may be symmetrical about the plane of the diaphragm or it may be made asymmetrical in order to reduce distortion, the asymmetry being introduced in the outer members only. Alternatively, distortion may be reduced by providing the symmetrical system with at least one exterior lens the radii of curvature of which are numerically greater than the focal length of the objective, or with at least one exterior plane-parallel plate. Data are given for three examples.